Remove example applications from build.

They can still be built.
Not included in any images.
Part 1 of 2 (meta-palmetto, meta-phosphor).
diff --git a/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc b/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
index 10fa40c..474dde8 100644
--- a/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
+++ b/meta-openbmc-machines/meta-openpower/conf/machine/include/openpower.inc
@@ -6,16 +6,23 @@
         "
 
 VIRTUAL-RUNTIME_obmc-phosphor-fan-ctl = " \
-       obmc-phosphor-example-sdbus \
+       skeleton \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-sensor-ctl = " \
-       obmc-phosphor-example-sdbus \
+       skeleton \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-chassis-ctl = " \
-       obmc-phosphor-example-pydbus \
+       skeleton \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-flash-ctl = " \
-       obmc-phosphor-example-pydbus \
+       skeleton \
        "
 
 PREFERRED_PROVIDER_virtual/obmc-phosphor-host-ipmi-hw = "host-ipmi-bt"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-chassis-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-event-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-fan-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-flash-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-policy-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-sensor-mgmt = "skeleton"
+PREFERRED_PROVIDER_virtual/obmc-phosphor-system-mgmt = "skeleton"